CN112197723A - Checking standard component and checking method of coordinate measuring machine - Google Patents
Checking standard component and checking method of coordinate measuring machine Download PDFInfo
- Publication number
- CN112197723A CN112197723A CN202011056286.7A CN202011056286A CN112197723A CN 112197723 A CN112197723 A CN 112197723A CN 202011056286 A CN202011056286 A CN 202011056286A CN 112197723 A CN112197723 A CN 112197723A
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- measuring machine
- coordinate measuring
- standard
- characteristic parameter
- checking
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/04—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness by measuring coordinates of points
- G01B21/042—Calibration or calibration artifacts
Abstract
The invention provides a checking standard component and a checking method of a coordinate measuring machine. Before checking, calibrating the characteristic parameters of the simulation workpiece, and taking the obtained characteristic parameter values as characteristic parameter standard values; during checking, starting a coordinate measuring machine, and calibrating a measuring pin by using a standard ball; then measuring characteristic parameters of the simulation workpiece, and taking the measured characteristic parameter values as actual measurement values; and comparing the actual measurement value with the characteristic parameter standard value, if the error of the actual measurement value relative to the characteristic parameter standard value is within an allowable range, judging that the state of the coordinate measuring machine is normal, and otherwise, judging that the state of the coordinate measuring machine is abnormal. The invention can find the state change of the coordinate measuring machine in time so as to avoid the risk of the correctness of the detection result caused by the value misalignment due to the state change of the coordinate measuring machine.
Description
Technical Field
The invention relates to the field of blade detection, in particular to a checking standard component and a checking method of a coordinate measuring machine.
Background
The state control of the coordinate measuring machine usually adopts the method required in the national calibration specification JJF1064 to carry out periodic metering, however, the coordinate measuring machine in the production field is influenced by factors such as temperature fluctuation, humidity, dust, vibration and the like, so that the state of the coordinate measuring machine can be changed in the valid period, and great risks are brought to the detection work.
Particularly, for a coordinate measuring machine for blade detection, because a measured workpiece is an irregular curved surface, and the measured parameters have related detection requirements such as a blade basin, a blade back, a leading edge, a trailing edge and the like, the requirement on the state of the coordinate measuring machine is more severe, and the metering characteristic of measuring equipment must be ensured within an allowable range to ensure the continuous accuracy and effectiveness of a measuring result.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a checking standard component of a coordinate measuring machine and a checking method thereof, which can find the state change of the coordinate measuring machine in time so as to avoid the risk of the correctness of a detection result caused by the value misalignment due to the state change.
The invention is realized by the following technical scheme:
the utility model provides a check standard of coordinate measuring machine, includes installation axle, benchmark piece, simulation work piece and standard ball, and benchmark piece, simulation work piece and standard ball wear to establish in proper order and install on the installation axle.
Preferably, the reference block is in the shape of a cube.
Preferably, the simulated workpiece is a simulation of the workpiece to be measured.
Preferably, the dummy workpiece is a dummy blade.
A checking method of a coordinate measuring machine is based on a checking standard component of the coordinate measuring machine and comprises the following steps:
before checking, calibrating the characteristic parameters of the simulation workpiece, and taking the obtained characteristic parameter values as characteristic parameter standard values;
during checking, starting a coordinate measuring machine, and calibrating a measuring pin by using a standard ball; then measuring characteristic parameters of the simulation workpiece, and taking the measured characteristic parameter values as actual measurement values; and comparing the actual measurement value with the characteristic parameter standard value, if the error of the actual measurement value relative to the characteristic parameter standard value is within an allowable range, judging that the state of the coordinate measuring machine is normal, and if the error of the actual measurement value relative to the characteristic parameter standard value exceeds the allowable range, judging that the state of the coordinate measuring machine is abnormal.
Preferably, before checking, an automatic checking program is compiled, and during checking, the automatic checking program automatically compares the actual measured value with the standard value of the characteristic parameter and judges the state of the coordinate measuring machine.
Preferably, after the coordinate measuring machine is started, the zero setting operation is performed, and then the measuring pin calibration is performed by using the standard ball.
Preferably, the dummy workpiece is a dummy blade.
Further, the characteristic parameters of the simulation workpiece are at least two of a blade basin profile, a blade back profile, a front edge thickness, a back edge thickness, a blade body thickness, a front edge R, a front edge position, a back edge position, a chord width, an overlapping point position, bending and torsion.
Preferably, the calibration is performed every day after the coordinate measuring machine is started.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the checking standard component, the standard ball and the simulation workpiece are integrated, so that the measuring space can be saved, and the accurate checking of the measuring head of the daily coordinate measuring machine can be ensured. When in use, calibrating the characteristic parameters of the simulation workpiece as the characteristic parameter standard values; during checking, the coordinate measuring machine measures characteristic parameters of the simulation workpiece as an actual measurement value; and comparing the actual measured value with the characteristic parameter standard value, and judging whether the state of the coordinate measuring machine is normal or not according to the error. The coordinate measuring machine is checked by regularly using the checking standard component, the coordinate measuring machine can be prevented from working with diseases, and the risk of the correctness of a detection result caused by the fact that the magnitude is misaligned due to the change of the equipment state when the coordinate measuring machine is detected is avoided.
Furthermore, a regular cube is used as a reference standard for accurate positioning, so that the reference is reliable during measurement.
The checking method can accurately judge whether the state of the coordinate measuring machine is normal or not, and stops working if the state is judged to be abnormal, so that the coordinate measuring machine is prevented from working when the state is abnormal, and the measuring accuracy is improved.
Furthermore, automatic checking is performed through an automatic checking program, and the method has the advantages that special operation training is not needed, an equipment operator directly calls the automatic checking program to complete automatic checking, the equipment user can master the equipment state at any time, and the reliability of a detection conclusion is improved.
Drawings
FIG. 1 is a schematic diagram of a structure of a calibration standard.
In the figure: a standard ball 1, a simulated workpiece 2 and a reference block 3.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, the calibration standard according to the present invention includes an installation shaft, a reference block 3, a simulation workpiece 2, and a standard ball 1, wherein the reference block 3, the simulation workpiece 2, and the standard ball 1 are sequentially installed on the installation shaft in a penetrating manner.
The reference block 3 is a cube, and a regular cube is used as a reference standard for accurate positioning to ensure that the reference is reliable during measurement.
The simulated workpiece 2 is a simulation of the workpiece to be measured.
The standard ball 1 is used for pin calibration before measurement.
The checking method of the coordinate measuring machine comprises the following steps:
before checking, calibrating the characteristic parameters of the simulation workpiece 2, and taking the obtained characteristic parameter values as characteristic parameter standard values;
during checking, starting a coordinate measuring machine, and calibrating a measuring pin by using a standard ball; then measuring the characteristic parameters of the simulation workpiece 2, and taking the measured characteristic parameter values as actual measurement values; and comparing the actual measurement value with the characteristic parameter standard value, if the error of the actual measurement value relative to the characteristic parameter standard value is within an allowable range, judging that the state of the coordinate measuring machine is normal, and if the error of the actual measurement value relative to the characteristic parameter standard value exceeds the allowable range, judging that the state of the coordinate measuring machine is abnormal.
The detailed description is as follows
In the present embodiment, the dummy workpiece 2 is embodied as a dummy blade. The simulation blade adopts the entity that is bigger than the actual blade thickness that awaits measuring and rigidity is good, ensures its stable state. The simulated blade is endowed with representative characteristic parameter values such as a blade basin profile, a blade back profile, front and rear edge thicknesses, a blade body thickness, front and rear edges R, front and rear edge positions, a chord width, an accumulation point position, bending, torsion and the like by a metering department, the representative characteristic parameter values are used as characteristic parameter standard values and are stored in a coordinate measuring machine system, and the coordinate measuring machine automatically measures corresponding characteristic parameter values according to a program during checking, uploads the characteristic parameter values to be analyzed and compared, and the state of the coordinate measuring machine is judged.
The specific implementation steps are as follows:
1) preparation before checking:
a) obtaining a characteristic parameter standard value: the metering calibration of the checking standard component is the basis for verifying the state reliability of the coordinate measuring machine. And the measuring department checks and checks the standard part for measurement, gives representative characteristic parameter values such as the contour of a blade basin, the contour of a blade back, the thicknesses of a front edge and a rear edge, the thickness of a blade body, the thicknesses of the front edge and the rear edge, the positions of the front edge and the rear edge, the chord width, the position of an overlapping point, bending, torsion and the like of the simulated blade, and inputs the characteristic parameter values as characteristic parameter standard values into a coordinate measuring machine system.
b) Automatic checking program: an automatic checking program for simulating the blades is compiled, and the automatic checking program comprises the following steps: and automatically detecting the characteristic parameters of the simulated blade to obtain an actual measured value, analyzing and comparing the actual measured value with the characteristic parameter standard value, judging whether the state of the coordinate measuring machine is normal or not according to a comparison result, and outputting a judgment result.
c) And fixing the checking standard component on the workbench of the coordinate measuring machine.
2) Checking the standard for use in the field (taking a daily boot as an example)
a) And starting the coordinate measuring machine, and returning the equipment to the zero position.
b) And calibrating a measuring pin before measurement by using a standard ball on the check standard piece.
c) And calling an automatic checking program to detect the checking standard component.
d) And automatically comparing the actual measured value with the standard value of the characteristic parameter calibrated by the metering department by the program, wherein the error of the actual measured value and the standard value of the characteristic parameter is within an allowable range, which indicates that the state of the coordinate measuring machine is normal, and if the error exceeds the allowable range and cannot meet the requirement, judging that the coordinate measuring machine deviates from the calibration state and immediately stopping using the coordinate measuring machine.
Claims (10)
1. The utility model provides a check standard of coordinate measuring machine which characterized in that, includes installation axle, benchmark piece (3), simulation work piece (2) and standard ball (1), and benchmark piece (3), simulation work piece (2) and standard ball (1) wear to establish in proper order and install on the installation axle.
2. Calibration standard for a coordinate measuring machine according to claim 1, characterized in that the reference block (3) is cuboid in shape.
3. Calibration standard for a coordinate measuring machine according to claim 1, characterized in that the simulation object (2) is a simulation of an object to be measured.
4. Calibration standard for a coordinate measuring machine according to claim 1, characterized in that the dummy workpiece (2) is a dummy blade.
5. A method for checking a coordinate measuring machine, based on the checking standard of the coordinate measuring machine according to claim 1, comprising:
before checking, calibrating the characteristic parameters of the simulation workpiece (2), and taking the obtained characteristic parameter values as characteristic parameter standard values;
during checking, starting a coordinate measuring machine, and calibrating a measuring pin by using a standard ball; then measuring the characteristic parameters of the simulation workpiece (2), and taking the measured characteristic parameter values as actual measurement values; and comparing the actual measurement value with the characteristic parameter standard value, if the error of the actual measurement value relative to the characteristic parameter standard value is within an allowable range, judging that the state of the coordinate measuring machine is normal, and if the error of the actual measurement value relative to the characteristic parameter standard value exceeds the allowable range, judging that the state of the coordinate measuring machine is abnormal.
6. A calibration method for a coordinate measuring machine according to claim 5, wherein an automatic calibration program is prepared before calibration, and when calibration is performed, comparison between the actual measurement value and the standard value of the characteristic parameter and judgment of the state of the coordinate measuring machine are automatically performed by the automatic calibration program.
7. A method as claimed in claim 5, wherein the coordinate measuring machine is started, and then the zero setting operation is performed, and the stylus calibration is performed using a standard ball.
8. A method of calibrating a coordinate measuring machine according to claim 5, characterized in that the dummy workpiece (2) is a dummy blade.
9. The calibration method for a coordinate measuring machine according to claim 8, wherein the characteristic parameters of the simulation workpiece (2) are at least two of a blade basin profile, a blade back profile, a leading and trailing edge thickness, a blade body thickness, a leading and trailing edge R, a leading and trailing edge position, a chord width, an overlap point position, a bend and a twist.
10. A method of calibrating a coordinate measuring machine according to claim 5 wherein the calibration is performed each day after the coordinate measuring machine is powered on.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834986A (en) * | 2021-09-02 | 2021-12-24 | 上汽通用五菱汽车股份有限公司 | Method for measuring electric signal error proofing, measuring equipment and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834986A (en) * | 2021-09-02 | 2021-12-24 | 上汽通用五菱汽车股份有限公司 | Method for measuring electric signal error proofing, measuring equipment and readable storage medium |
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